Is there a way to make UDF that gives a description like the native Excel functions have when user clicks the Fx button?

Question

If I type =vlookup( (or any other native Excel function) in the formula bar and then click the little Fx button to the left of the formula I get a Function Argu

Answer 1

I suggest further investigating the Application.MacroOptions method. That method allows you to provide not only a description for the function, but also a description for each of the arguments. For example, if you have a function called "SampleFunction" that takes two arguments, you can run the following and it will set you up nicely for using the fx button with your function.:

Private Sub RegisterMyFunction()
    Application.MacroOptions _
        Macro:="SampleFunction", _
        Description:="calculates a result based on provided inputs", _
        Category:="My UDF Category", _
        ArgumentDescriptions:=Array( _
            "is the first argument.  tell the user what it does", _
            "is the second argument.  tell the user what it does")
End Sub